Web controlling and tension device



H. A. W. WOOD. WEB CONTROLLING AND TENSION DEVICE.

APPLICATION FILED JUNE 16. l9l3- 1,314,178. r PatentedA 26,1919.

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'H. A. W. WOOD. WEB CONTROLLING AND TENSION DEVICE.

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HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOB, BY MESNE ASSIGNMENTS, '1'0 WOOD NEVSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A GORPORA- 'IION' 0F VIRGINIA.

Lemme.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application filed June 18, 1918. Serial No. 773,917.

To all whom it may concern:

' Be it known that I, HENRY A. WIsE W001), a citizen of the United States, residing at New York, in the county of New York and State of New -York, havezinvented a new and useful Web Controlling and Tenslon Device, of which the following is a spec1- fication.

This invention relates to the passage of a web from the web roll to the cylinder of a rotary web rintin press.

The princlpal ObJGCtS of the invention are to provlde an improved tension device therefor suitable for use no matter whlch way the web passes over it; to provide means for controllin the tension in sucha way as to minimize t e breakage usually caused by distorted rolls; to provide a simple and inexpensive means whereby a newspaper roll can always be put in (fOSltlOll ust before the old one is exhauste so that a continuous supply can be provided for; and generally to lmprove thls part of a rotary web printing press. The invention also involves improvements in details of constructlon and combinations of parts as will appear hereinafte Figure 1 is a side elevation of a art of a printing press with a preferred em odiment.

the web rolls is used at a time.

On the frame are provided a series of brackets 12, each havin a cylindrical hollow socket 13 thereon. nto this socket extends a in 14 rotatably mounted in the socket. is pin is provlded with a shoulder and with screw threads beyond said shoulder. This pin passes through a curved slot 16 in a bracket 17 and a nut is provided for securing the pin in any desired por. Reference is to be had to the accompany-- ing drawings, in wh1cha pair of web.

sition along this slot. On account of this construction the pin is always free to turn in the socket, and the bracket is free to swing.

Mounted on each bracket is a plate 20 on whlch is an adjusting hand screw 21 provided with a lock nut 22 and with a spring 23. This spring engages a sliding box 24 mounted in ways 25 on the bracket. Each pair of these boxes supports a guide roll 26 extending across the machine.

A web passes from the web roll, either on the underside or upper side as indicated in dot-and-dash lines, over the guide roll and then down. Thus the tension device is located between the web roll and the feeding apparatus. The brackets are so designed and balanced and the adjustment in the slot If} so arranged that when the parts are runmng, the brackets swing to such position that a line passing through the center of the shaft of the roll 26 and through the center of the screw 21 will substantially bisect the angle between the strand of the web which passes to the guide roll and the strand which passes from it. The parts are shown in the position in Fig. 1 that they would assume when the web passes from the top of the upper web roll to the guide roll. The angle which the paper makes in passing to the tension roller from a full roll is different from the angle of the paper in passing from a very small roll, and this swinging of the tension roller will enable it to assume a correct position half way across the angle, whether the angle is wide or narrow.

Durm the running of a press the tension roller W111 dance, due to the peculiarities of the web; and this dancing motion, or vibration, sometimes causes a fracture of the web, for instance, when the tension roller has been depressed and is suddenly released and starts to the other extreme of its motion. Now, if while it is movin quickly the web should suddenly tauten, t e momentum of the roll may give the web such a blow as to break it. I have found, however, that if a second tension roller is introduced in the pathway of a web, under similar circumstances, it relieves the blow of the tension roller,'-and thus, by playing into each others hands, these two rollers savemany paper breaks in the course of a day.

The web then passes down to a second guide roll 28 which ismounted' in similar sliding blocks 24 .on a similar pair of brackets 29. These brackets, however, are fixed in stationary position by means of bolts 30. The guide roll pressed upon by a spring 23 as in' the other case, but the parts are adjusted up so that only a very slight movement is allowed.

The web then passes around a bending roll 34 journaled in brackets 35 on-the frame and driven from the feed of the press by gear 34. The web passes under a. control roll 36 mounted in bearings on the and then over, a shaft '38 which is operated from the press. On this shaft is .a spiral gear 39 meshin with a gear 40 on a shaft 41. This shaft y spiral gears 42 drives the shaft of the control roll 36. On this shaft is another gear 44 which drives two gears 45 on shafts 46 and also a, gear 34 on a shaft carrying the bending roll 34. These shafts 46 are Journaled in hinge-cap bearings 47 and car a plurality of tape pulleys 48. Feed be ts or tapes 49 pass rom these pulleys around in contact with the control roll 36 and then over tightener pulleys 69.

The hinge cap bearings are provided so that when a belt is broken and replaced the shafts 46 and 46 can be lifted out of their bearings very readily, a new belt passed over the end thereof, andon the pulleys, and the shaft readily put back in place. The caps are secured in closed position by nuts 50 and screws 51.

Each of these tightener pulleys is supported on an arm 52 loose on a transverse shaft 53. Integral with each of the arms 52 is an arm 54 55 through which passes a screw 56 into a nut 57 mounted on an arm 58 which is keyed to the shaft 53. Thus each of the arms 52 can be adjusted relatively to the shaft 53 for taking up the slack of its feed belt or tape. For adjusting the entire system of tightener pulleys simultaneously the shaft 53 is provided with an arm 60 keyed to it. This has a puppet 61 which receives an adjusting screw 62 passing through a puppet '63 on the frame 10.

From the bending roll 37 the web passes to the printing couples. Web rolls are sometimes supplied which have looseoutside edges and which, therefore, require that they be given a material wrap-before-printing about the impression cylinders, to prevent the edges from working toward the center and wrinkling. In order that the web may be laid smoothly over the surface of the first impressioncylinder before printing, a bending roll 71 is provided to deflect the web away from the printing cylinder 72 and toward the impression cylinder 70, just before the web enters the bite. Furthermore, a pair of rolls 73 and 74 are provided between the first and the second couples so in this case is one half that of the plate cylinder. frame,

which is provided with a puppet located as to bend the web around the first impression cylinder 70 a slight distance after the impression to bring it at once out of contact with the printing plates. Thus it serves to cause the web to wrap around part of the impression cylinder and to draw away from the printing cylinder at once after the impression. The roll 73 which comes in contact with the freshly printed side of the web has acircumference equal to the length of an impression or printed product; that is,

Thus the inked impressions deposited on this roller always register, so that they cannot be V transferred to blank spaces or margins. These rolls also have the effect of bringing the web into contact with the impression cylinder of the second couple before it enters the bite between the two cylinders of that couple. From the second couple the web passes to a roll 75 which also keeps the web away from the printing surface of the second couple, and increases 'the wrap around the second impression cylinder after printing. These rolls are mainly for preventing wrinkles in the web and insuring that the Web shall be laid smoothly on both of the impression cylinders before printing.

Although I have illustrated and described only a single embodiment of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited in these respects, butwhat I do claim is 1. The combination with a printing ma chine frame and means for supporting a web roll, of bearings for a guide roll pivotally supported on sald frame located between the pivot and web roll and also capable of slidmg away from the pivot toward the web roll, means for ad]usting said bearings about the pivot, and yielding means for holllding the bearings away from the web ro 2. The combination with a printing machine frame, of a stud thereon, a bracket having aslot for receiving said stud and capable of being adjusted along the stud and held in adjusted position, said bracket belng mounted on the stud to swing freely thereon, a web guide roll supported at one end by said bracket, and means for guiding a web over said roll from and to the side thereof opposite said stud.

3. The combination with a printing machine frame and a web roll, of a pair of brackets pivoted to said frame, a guide roll supported by sald brackets for receiving the web, bearings for said guide roll slida'bly mounted on said brackets, and means whereline drawn through the center of the guide roll parallel with the direction of adjustment of the bearings thereof will substantially bisect the angle between the on-coming strand of the web and the out-going strand.

4. In a device of the character described, the combination of a stud, a bracket having a slot for receiving said stud and capable of being adjusted along the stud and held in adjusted position, said bracket being mounted on the stud to swing freely thereon, a bearing block mounted to slide on said bracket, a web guiding roll supported at one end by said block, a spring for holding said block normally at one end of the bracket, and means for adjusting the tension of said spring. a

5. The combination with a printing machine frame, and means for supporting a web roll, of a pair of adjustabl pivoted brackets on the frame, a guide .rol supported by said brackets for receiving the web from the web roll, means on each bracketv for holding the guide roll away from the web roll and applying tension to the web, a second guide roll for/receiving said web from the first, a second pair of brackets for holding the second ide roll, and means for holding the secon brackets in fixed position.

6. The combination with a printing machine frame, and means for supporting a web roll, of a pair of brackets on the frame, pivots for swingingly supporting said brackets, means whereby said brackets can be adjusted laterally on the pivots, a guide roll supported by said brackets for receiving the web directly from the web roll, yielding adjustable means on each bracket for holding the guide roll away. from the web roll and applying tension to the web, a second guide roll 1n position for receiving said web from the first, a second pair of brackets for bolding the second guide roll, said brackets of the second pair being provided with adjustable tension devices for the roll, and means for holding the second brackets in fixe position.

7. The combination with a printing machine frame and means for supporting a web roll, of a pair of brackets on the frame, pivots for swingingly supporting said brackets, means whereby said brackets can be adjusted laterally on the pivots, and a guide roll supported by said brackets for receiving the web from the web roll.

8. The combination with a printing machine frame, and means for supporting a web roll, of a pair of brackets on the frame, pivots for swingingly supporting said bracketS, means whereby said brackets can be adjusted laterally on the pivots a guide roll supported by said brackets or receiving the web from the web roll, and yielding adjustable means on each bracket for applying tension to the web.

9. The combination with a printing machine, and means for supporting a web roll, of a freely suspended web guide and tension roll for the web, and a second web guide and tension roll for the web in position to receive the web directly from sald first guide roll.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

HENRY A. 'WISE WOOD. Witnesses:

' B. W. S'mEaER,

LILLIAN C. JONES. 

